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name: testing-strategies description: This skill should be used for test coverage, test pyramid, unit/integration/E2E test design, TDD, BDD, mocking strategies, test doubles, test architecture whenToUse: Designing tests, coverage strategy, test pyramid, TDD, BDD, mocking, test doubles, test organization, E2E testing, integration testing strategy whenNotToUse: Simple test additions, established patterns, single test file edits seeAlso:

• skill: architecture-patterns when: test architecture decisions
• skill: react-patterns when: React component testing
• skill: python-patterns when: pytest patterns
• skill: go-patterns when: Go table-driven tests
• skill: superpowers:test-driven-development when: writing tests first, rigorous TDD discipline

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Testing Strategies

Comprehensive test design for deployment readiness.

Test Pyramid

Copy    /  E2E  \       Few, slow, expensive
   /  Integ  \      Some, medium
  /   Unit    \     Many, fast, cheap

Coverage Guidelines

Unit Test Patterns

• Test one thing per test
• Clear arrange/act/assert
• Mock external dependencies
• Fast execution (<1s each)

Integration Test Patterns

• Test real dependencies
• Use test databases
• Clean up after tests
• Cover API contracts

E2E Test Patterns

• Critical user journeys only
• Stable selectors
• Retry flaky network calls
• Parallel where possible